Press.



No. 827,847. PATENTBD AUG. v, 1906. o. lE. BROOKS.

PRESS.

APPLICATION FILBD JAILZB. 1905.

4 SHEETS-.SHEET Wg? VvE/vrom' @y ym @4% M l :Y u 5y MQW l T7-V5, l

PATENTED AUG.' 7, 1906.

vG. E. BROOKS.

PRESS.

APPLIGATION FILED 11.11.23, 1905.

4 SHEETS-SHEET 2.

/N VEN?" 0R" WIT/VES'SS" `PASLElwlfED'AUG. 7, 1906.

o. E. BROOKS.

PRESS.

APPLIQATION FILED xmms. 1905.

4 SHEETS-SHEET 3;

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Rs ca.. WASHINGTON, n. c.

N0. 827,847. PATENTED AUG. 7, 1906.v C. E. BRO-OAKS,

PRESS.

. APPLICATION FILED JAEN/1905. A l

. A I V 4'BHE-ETS-SHEET 4. fw/

. Fig 2 is a side view.

UNITED STATES PATENT OFFICE..

CHAR'LES E. BROOKS, OF ST. LOUIS, MISSOURI, ASSIGNOR TO B. ROTH TOOL COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

PRESS.

Specification of Letters Patent.

Patented Aug. 7, 1906.

Application filed January 23, 1905. Serial No. 242.253.

citizen of the United States, and a resident of. i

the city of St. Louis, in the State of Missouri, have invented a new and useful Improvement in Presses, of which the following is a specification.

My invention relates to presses, and especially to embossing and printing presses.

It has for its principal objects to provide die-reciprocating mechanism comprising a continuously-moving part and allowing the die a period of rest at one extremity of its movement; to provide an eccentric transmission having an idle point in its cycle of operations; to provide driving mechanism for the press cross-head having intermittent actuatingengagement with the cross-head; to provide means to cushion the actuating engagement of the driving mechanism with the cross-head, to provide a positive and adjustable stop for the die-carrying member to properly position it during its period of rest, and other objects hereinafter more fully appearing.

My invention consists in the parts and in the arrangements and combinations of parts hereinafter described and claimed.

In the accompanying drawings, forming a part of this specification, and wherein like symbols refer to like parts wherever they occur, Figure 1 is a front view of the press, the wall of one dash-pot being broken away.

Fig. 3 is a central vertical sectional view. Fig. 4 is a central sectional view through one of the dash-pots. Fig. 5 is a sectional view through one of the columns of the frame. Fig. 6 is a side view of the eccentric and strap. V Fig. 7 is a sectional view on the line 7 7 of Fig. 8. Fig. 8

. is a vertical sectional view through the eccentric and strap on the line 8 8 of Fig. 7. Figs. 9, 10, and 11 are views similar to Figs. 6 to 8. of a modified form of eccentric and strap; and Fig. 12 is a view similar to Fig. 11, showing the position of the parts after a half-revolution.

From a base 1 rise hollow columns 2 2, which are connected intermediate of their ends by a beam 3. Below the beam 3 a member 4 extends between the columns and constitutes the front portion of a bed-plate 5. The bed-plate is supported at its rear enduby small columns 6 6. The columns 2 2 have widely-separated bearings on the base. These parts form the'frame of the machine.

The bed-plate 5 is provided with grooves 7, in which a table 8 reciprocates. The table is adapted to receive an embossing and printing die 9 or a printing-plate, which may be secured in any manner desired. Coperating with said die is a platen or corresponding die 10, which is secured to plunger '11. The plunger in turn is secured to a cross- `head 12 by means of a screw-threaded shank 13 and nuts 14 15, one of which works in a slot in the cross-head and the other of which is arranged below the cross-head and serves as a set-nut. The ends ofthe cross-head -eXtend through the bifurcated upper ends of `surround the guide-rods 16 16 and support the cross-head, tending to hold it in its uppermost position. They rest at their lower i ends upon adjustable seats 17 a, whereby the tension of the springs can be adjusted and springs of dierent lengths can be accommodated.

In embossing and printing press work it is the common and most satisfactory practice to make the lower die 9, which is generally an intaglio-die, of steel or the like, and caseharden it,then to use pasteb oard or the like for the platen, which is hammered up tov form the corresponding die or relief. So long as the two dies always come together in the same relative position the work will be satisfactory; but obviously the slightest variation will result in the destruction of the upper die. To ink and wipe the lower die 9, it is moved rearwardly from beneath the upper die or platen. No inking and wiping mechanism are shown, as any such mechanism desired can be mounted over the bed-plate, the operation of the parts shown being in no way affected by the inking and wiping' mechanism. The lower die 9 must move from the rear forwardly under the inking and wiping mechanism and then under the plunger and upper die or platen and stop there while the plunger makes contact with it and retires. die must be accurately positioned in the same place at every reciprocation, must be firmly held there, and must not movei during the The y these desiderata, the following mechanism is provided: Upon the lower side of the table a block 18 is secured. It is provided with a slightly-conical bore 19, in the bottom of which is a block 20, preferably of wood. A pin 21 is secured in the frame in alinement with the bore of the block. The pin has a screw threaded section which engages a screw-threaded counterbore in the frame. Thus the pin can be adjusted to different positions and can-be set in any osition by a set-nut22. The rear end c the pin is slightly conical to correspond to the bore 19 in the block.` The pin -is adjusted so that it will stop the table and die in their most forward position or position of rest. The conical shapeof the pin and bore results in drawing the table tightly down onits ways, and

thus prevents the impact of the table on the ways when the platen strikes the die, which often occurs when the table is confined only by the ways. /Vhen the bore is worn, it is only necessary to shave the block 2O and ad- Vance the in 21 a corresponding amount. The wi lthus be permitted to enter the bore far. enough to compensate for the wear.

A A lever 28 is pivoted at its lower end upon the basel. lIts upper end is connected to the table 8,'and die 9 by means of a link 24 whichlis ivotally connected withthe block 18.' This ever is oscillated about its pivot or ful'crum on the base by means hereinafter described. It is noted here that the manner in which'the lever is connected to the table permits a slowing up of the movement of the table as' it approaches its stopping-point. As the table begins its forward movement it moves ysubstantially as rapidly as the upper end ofl the, lever; butas the table ap roaches its stopping-place the movement o the upper' end ofthe lever relative to the table (permitted by the link) is continually increasing, and hence its entire movement is not transmitted'to the table. This will clearly appear from acompariso'n of the parts inthe 'position shown in full lines in Fig. 8 with the position shown in dotted lines. As will appear below` the parts actuating the lever impart to; it am'cvement diminishing in speed as it approaches its foremost position.

l A power-shaft 25 is mounted in the bifurcated lower ends .of the columns. It may be actuated by` vany suitable source of power. Parallel withsaid power-shaft a main shaft 26 is journaledl VMotion is communicated to the main shaft by means of a pinion 27 on the 'ower-'shaft meshing with a spur-gear 28 on the main shaft.

eccentric 29 is keyed on the mainshaft 25 between the columns 2 2 andl in the vertical plane ofthe pin 21 block 18 lever 28 ,and link 24. The eccentric is made in two parts meeting in the diametral line extending through the point of maximum eccentii city and secured together by bolts. When the two parts are assembled, the eccentric consists of parallel disks connected at one side by a part having a substantially semicylindrical bearing surface 80. This bearing surface has an angular extent of slightly less than one hundred and eighty degrees to permit relative movement of the eccentric and strap at the time the roller hereinafter described enters the recess hereinafter described. At the side of the disks opposite the main shaft a roller 81 is journaled. This roller is so located that its outermost point lies in the continuation of the cylindrical surface, of which the bearing-surface 80 forms a part. Thus the eccentric has a discontinuous periphery.

Surroundingfthe eccentric and lying between the disks thereof is an eccentric-strap 82. The greater portion of the bearing-surface of the eccentric-strap is cylindrical, as usual. At one point, however, there is a recess 88. The bearing-surface of this recess conforms to' the path-of the bearing-surface of the roller 81. Thus from the time the roller enters the recess the eccentric-strap will cease to be advanced by the eccentric and will not be again advanced lor retracted until the roller moves out of the recess.I Therefore this recess forms an idle point in the transmission of movement from the eccentric to the eccentric-strap. On each side of the strap are small bearing-blocks 84, bearing on the edges of the disks of the eccentric to prevent dropping of the eccentric-strap when the roller enters the recess.

The eccentric-strap is connected with the lever 28 Aby means of a substantially V- shaped frame 85, an eyebolt- 86 being pivoted on a bolt in the lever and connected to the frame by means of nuts. j

j The recess 88 inthe eccentric-strap is so located that the idleV point occurs just when the table and die havereached their'foremost position, and the recessl is soI proportioned thatthe period of the idle point is sufficient to permit the engagement of the plunger or platen with the die before the latter begins its rearward movement.

The construction described above results in an effectual locking of the table during its period of rest. As the roller is constantly in engagement with the bearing-surface of the recess, rearward movement of the eccentricstrap and table during the period of rest cannot occur. As the blocks 18 and 20 are in engagement with the pin 21, forward movement of the table cannot occur. Thus it is insured that there shall be no movement of the table during the time the impression is being made.k l v The mechanism for reciprocating' the crosshead 12 and the connected Vplunger 11 and platen or die 10 will now be described.'

roo'

ISO

i AThe spur-gear 28 is provided with a wristpin 37. Upon the end of the main shaft 26 v opposite to the spur-gear 28 a disk 38 is secured. A wrist-pin 39 is provided on said disk. v

The cross-head 12 terminates at its ends in journals 40, pierced by holes 4l. The dimensions of said holes transverse to the journals increase in diameter from the horizontal diameter upwardly and downwardly for a purpose hereinafter appearing. Sleeves' 42 are journaled on the ournals 40 and are provided with vertical bearings and dash-pots 43.' Each dash-pot is provided with a petcock 44, by means of which the rate of escape of air from the dash-pot can be regulated. A vertical groove 45 is provided in the wall I of the dash-pot in line with the petcock and extends to the bottom of the dash-pot. In the bottom of the dash-pot annular rubber cushions 46 are countersunk.

Pitrnen 47 47 are journaled at one end on the wrist-pins 37 39, respectively, and extend upwardly through the bearings in the sleeves 42, the holes in the journals 40 on the ends of the cross-head, and through the dash-pots 43. The pitmen thus have a rocking bearing on the cross-head. A disk 48 is secured at the upper end of each pitman by means of a nut. These disks constitute pistons coperating with the dash-pots. The disks are rovided with a peripheral flange 49,which 1s so located as to enter the groove containing the annular rubber cushions and bear upon the latter.

The. springs normally hold the cross-head in its uppermost position. As the main shaft rotates the pitmen are carried downwardly. AThe pistons enter the dash-pots, and the air therein is gradually compressed. Thus the force acting upon the cross-head is gradually increased. When the pistons reach the bottom of the dash-pots, the peripheral ianges 49 engage the rubber cushions 46, and the impact of the itmen on the crosshead is thus further cus `oned. Finally, the faces of the piston will engage the metallic bottoms of the dash-pots and further relative movement of the pistons and dash-pots ceases until after the return stroke has been begun, when the above operations are reversed. The cross-head may have begun its downward movement before the pistons touch the metallic bottoms of the dash-pots but in any event there is no sudden impact, with its consequent arring and `vibration of the machine.

The wrist-pins are so located on the main shaft and the length of the pitinen is so fixed that the cross-head, plunger, and die or platen will reach their lowermost positions during the period of rest of the table and die in their foremost positions.

While the form of eccentric described above is the preferred form, other specific forms can be used. A modification is shown in Figs. 9 to l2. In this form for the cylin- The recess 53 in the eccentric-strap is a pocket.

The rollers 50 50 pass over the recess as.

they engage the bearing-surface at each side of the pocket. The narrower roller 52, however, enters the recess or pocket with the same result is in the preferred form of eccentric.

As shown, no change need be made in the eccentric-strap to use it with the modified form of eccentric. It is obvious, however, that when the preferred form of the eccentric is used the Arecess in the eccentric-strap may extend over the full width of the eccentricstrap, as the angular extent of the recess is less than the angular extent of the semicylindrical bearing-surface, and hence the latter cannot enter the recess.

Obviously my machine is capable of considerable modification within the scope of my invention, and therefore I do' not wish to be limited to the specific construction shown and described.

What I claim as my invention, and desire to secure by Letters vPatent, iss l. In an embossing-press, the combination with a reciprocating die, of a plunger eo operating therewith, a driven shaft, and pitman-rods driven from said shaft and making sliding connection with saidplunger.

2. In an embossing-press, the combination with a reciprocating die, of a plunger eooperating therewith, a driven shaft, pitmanrods driven from said shaft and making sliding connection with said plunger, and cush ions of resilient material between Said pitman-rods and said plunger.

3. In an embossing-press, the combination with a reciprocating die, of a plunger cooperating therewith, a driven shaft, pitmanrods driven from said shaft and making sliding connection with said plunger, and springs supporting said plunger.

4. In an embossing-press, the combination with areciprocating die, of a plunger cooperating with said die, a cross-head carrying said plunger, guide-rods passing through said cross-head, springs surrounding said rods and supporting said cross-head, a driven shaft, and pitnian-rods driven from said shaft and making sliding connection with said cross-head.

5. In an embossing-press, the combination with a platen, of a reciprocating die, a shaft, an eccentric on said shaft, an eccentricstrap surrounding said eccentric and provided with a recess forming an idle point, and operating connections between said eccentric-strap and die.

IOO

IIO

6. Ina press, a frame, a cross-headreciproeatingly mounted L in .said frame, sleeves j ournaled t on said `cross-head,l andI provided With bearings extendingy transversely to*y the` cross-head,A a main shaft,` pitman-.rods .connected to said shaft andslidinglymountedin -he4 bearings vin said sleevesand rneanslon said pitman-rodssto engage said sleevestdur-v ing aiportionroithe moyementohsaid pit-` man-rods` 7. Intapress, afra1ne,ka oroslseheadvrecipf pitman-rodsLtol` engageaid, sleeves :during al partof themovement of. the pitman-rods, and meansto cushionl theimpactof. said means and saidisleeyes.4

8. In a press, a Jframe, acrossheadrecip, rocatingly mounteddn said drame,` a,shai't,

pitman-rods connected to saidshaft and said" cressvheady and having al :sliding .connection with the1 latter, Vand means to cushion' the impact of each'or1 said pitman-lQd, On, cross-head comprising adash-potand a piston, one of Whiehiisconnected tdthefcrosse head and. the otherfofwhieh; is` connected to the pitman-rod.

9. In alpress, airainefarosshead reciprocatingly mounted in .said frame, means ,to normally hold said; cross-head oneyl eX,- tremityof its path, sleevesjournaled on said crossehead tand prpvided ,With; .dash-ppts,l Aresilient Lcushions Y seated in the bottoms of said dash-potsa mainV shaft, p itman-rods. con; nected to said-shaftI andfslidingly engaging said sleeves, andicross-head, and pistonsonl said pitman-rods imposition to enter said dash-pots and engage saidcushions.

10. In avpress, a frame, acrossf-head-recip-v, rocatingly mounted in saidframe, springsto normally` hold said cross-head at one` eX.- tremity otits path, adjustable seats forl said springs, a main shaft, and;pitmanrodsconf nectedto said main shaft andfslidingly connectedwithlsaid cross-head.

1-1. InL a, press, a frame, a die-receiving member .reciprocatingly mounted in,4 said frame, a stop forsaid die-receiying member adlustablymountediin4 saidl fram@ and means. l.110 reclprcate Said dlevreselrlllg meer ber comprisingan eccentricV havinga discfon-` tinuous periphery and an eccentric-strap hav-` ing a recessiprovided'fwitha bearing-surface conforming to .the path `or ,the bearing-points of ,they eccentric in ,the region, of maximum eccentricity, whereby saiduslide isI givena `pe' riod of rest i' and issecurely heldagainst movement during such period.Y D

l2. Inla press, aIrame a die reciprecatf` ingly mounted in said frame' na'lplunger co-I operating With said die means to reciprocate said plunger,` means ,to reciprocate t said comprising` an eccentriopand( fanx'ecccntric strap having a recess .formingf'anfidle lpoint, said recess being so located' as to` befe'ective when said ldie, is in `alinement .With said'lplu'nger, and ay stop adjustably l1iiounted'insaid frame ytol positionz saidA die in aline'inentfwith said plunger.`

13. In alpress, aframe provided Ways, aI die receiving member reeiprocatingly mounted rin Ways inTV-said franie,fmeai1s 'to reciprocate said die-receiyingmember, a stop adjustably mountedin: said a mellber on|` ,said Idie-receiying mlibc?. to( cooperate with; said stop.,` the meeting portions 4"of said stop and said memberlhaying, ycorrespending frusto. #conical Surfaces, Whfbyl Said l di.- receivingk member is held firmly toits Ways."

a die receiving member reeiprocatingly mounted in said Ways,` means tol reciprocate said Vdie-receiving member, a stophinoiinted in said frame, a member on said ,diefregeiyinr membe,rto` coperate Withsaid stop, 'sait stopy and,v said. rneniiber having"y interlocking engagenientwith each other` and oneI of theli'n being amable, whereby* said. diet-rearing memberisheld to itsyvays. In testimony whereofg I have signed my name to this speciiication, in 'the= presence of two subscribingwitnesses, 21st of January, 1905, abst- LQuS, MSQflI CHAS. BROOKS.

Witnesses;

FREDg F. REISNER, J. B. MEGoWvN: 

